Mushrooms can be planted and grown on blocks in light levels below 13 and not directly underneath the sky. If planted on mycelium or podzol, they can stay planted in any light level. Both brown and red mushrooms grow at the same rate regardless of light level.[1][2]

Mushrooms were a decorative item, having no crafting use and remaining in the ground when planted. Mushrooms could be placed on any block except another mushroom, and would remain planted when the block below them was removed.

Pigs had a chance of dropping red mushrooms and sheep dropped brown mushrooms.

Mushrooms could be generated in the open when exploring during night, or under low-light conditions such as those found under trees or overhangs. If planted in direct sunlight or a light level higher than 12 they popped out of the ground. Several bug reports mentioned mushrooms growing on top of trees, but this was a very rare phenomenon.

Mushrooms were given an ability to spread in light levels under 13 onto any block touching their own, including blocks located upwards and downwards diagonally. Mushrooms could be placed on any solid, non-transparent, block including pumpkins, workbenches, furnaces, and chests.

Red mushrooms bear a strong resemblance to Amanita muscaria mushrooms, more commonly known as fly agarics. Consuming them will cause delirium and hallucinogenic effects if their psychoactive properties have not been reduced by parboiling. Similarly, red mushrooms in the Minecraft Survival Test damaged the player when eaten.

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